Symptoms related to the occurrence of the Baker's cyst itself are very rare, but if they do occur, they may be related to its size and advancement, as well as the underlying disease process and inflammation of the knee joint. The most important symptoms that may indicate the presence of a popliteal cyst are:

clearly palpable lumps under the skin at the back of the knee
knee pain worsening with prolonged walking and during physical activity,
redness and warming in the area of ​​the cyst under the knee,
swelling and a feeling of "fullness" in the knee,
limitation of flexion and extension of the knee joint,
depending on the size of the cyst, there may be numbness in the calf area (also when the cyst ruptures), pain and swelling of the lower leg,
limb function limitation.